For any visitors here who don't routinely stop by The Online Photographer, you might want to link on over to a technical article of mine that will go up there sometime later today. It's about working with that strange light source, The Sun.
A sneak preview:
"Full sunlight in the foreground and background, deep shadow (much darker than open shade) in the middle. I set the camera to "sunny 16" (1/320th@f/8 with effective ei of 80) to keep the highlights from burning out, then used a little Recovery in ACR to give them more substance along with a lot of Fill Light (stupid name but useful tool) to bring out some sense of texture in the deep shadows. Note the extra tone in the lower surface of the I-beams from light bounced back up from the pavement."
Click on over to read the whole thing.